Finding the Fourth Proportional to 144,145.56, 198,791.82 and 90,436.44

Step by Step Solution

1. Step 1: Write the proportion equation
   144,145.56 : 198,791.82 = 90,436.44 : x
2. Step 2: Convert to fraction form
   144,145.56/198,791.82 = 90,436.44/x
3. Step 3: Cross multiply
   144,145.56x = 198,791.82 × 90,436.44
4. Step 4: Simplify right side
   144,145.56x = 17,978,024,501.92
5. Step 5: Solve for x
   x = 17,978,024,501.92/144,145.56
6. Step 6: Final answer
   x = 124,721.32